These are pretty fun - we have them at work and they stick wonderfully on glass (...although you could also just whiteboard pen on the glass, hmm...). We have a few on a more bumpy wall and one of them sticks fine while the other is now taped down because otherwise it won't stay up. I'm not sure if that one got peeled off before and now it's less sticky, or what.
The other issue with the ones on the wall is that when we pull them off, there will be a circle-shaped dinginess from erasing the ink and it getting on the wall.
I'm thinking about getting one for cupboards in my kitchen, and possibly a more flat wall at my house. I think the erasing/ink-all-over issue will be alleviated if I get bigger ones and just write toward the middle, being careful about the edges when I erase.
eta: i was wondering about steam because one of the cupboards is over the stove... here's what the overexcited faq says:
Do WallPops work in the bathroom? I am afraid that the steam from the shower will cause them to peel away from the wall.
If you are looking for wall decals for bathroom décor, WallPops are perfect! In fact, I Hate My Bath on the DIY Network used WallPops Malaya Blox in their Historic Style, Modern Luxury episode, totally revamping an awkward bathroom into a beautiful space that included our WallPops wall decals. As long as the WallPops are not getting directly sprayed with water, they will look fabulous in a bathroom setting. For fun bathroom decor ideas, check out our gallery of WallPops bathrooms!